CN104541573B - Sense heater and induction type cooking hob - Google Patents
Sense heater and induction type cooking hob Download PDFInfo
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- CN104541573B CN104541573B CN201380042725.0A CN201380042725A CN104541573B CN 104541573 B CN104541573 B CN 104541573B CN 201380042725 A CN201380042725 A CN 201380042725A CN 104541573 B CN104541573 B CN 104541573B
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- sensing
- sensing heater
- heater according
- control circuit
- induction coil
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Inverter Devices (AREA)
- General Induction Heating (AREA)
- Induction Heating Cooking Devices (AREA)
Abstract
Sense heater the present invention relates to one kind.This sensing heater is included or corresponding to a rectification circuit.The input of rectification circuit is connected to or may be connected on ac power supply terminal.Four capacitors form bridge circuit between two lead-out terminals of rectification circuit.This bridge circuit includes the first capacitor tandem and the second capacitor tandem.Induction coil is interconnected in the center of the bridge circuit.At least two semiconductor switch are each parallel-connected at least one of capacitor of the first capacitor tandem.This sensing heater includes control circuit module, the coordination electrode for controlling these semiconductor switch.Vent diverter is connected in series with the first capacitor tandem, wherein, the vent diverter and the first capacitor tandem are interconnected between these lead-out terminals of rectification circuit；And wherein, vent diverter is connected on the input of control circuit module.
Description
Sense heater the present invention relates to one kind.In addition, the present invention relates to a kind of induction type cooking hob, this sensing
Formula cooking hob includes at least one sensing heater.
Use feeling answers heater in induction type cooking heater.Figure 10 is illustrated to be had according to one kind of prior art
Zero voltage switching (ZVS) semibridge system sensing heater of control circuit module.The semibridge system sensing heater includes two
Individual transistor S1 and S2, two diodes D1 and D2, induction coil L and four capacitors C1, C2, C3 and C4.Rectification circuit
10 include four diodes and another capacitor.Rectification circuit 10 is provided for being connected on ac power supply terminal 12.This
Outside, the sensing heater includes gate driving circuit 14, microcontroller 16, power control circuit 18, zero-crossing detector 20
And HF current transformer 40.Induction coil electric current IL, inverter output voltage VS and grid voltage are shown in Figure 11
VG1 and VG2 figure.
However, the sensing heater is not realized on single printed circuit board.Some integrated circuits are independent electricals
Road.The compact arrangement of the sensing heating generator is impossible.
It is an object of the present invention to provide a kind of improved sensing heater, the sensing heater allows to its portion
Part carries out compact arrangement.
The purpose of the present invention is realized by sensing heater according to the present disclosure.
According to the present invention, vent diverter is connected in series with the first capacitor tandem, wherein, the vent diverter and the first electricity
Container tandem is interconnected between these lead-out terminals of rectification circuit；And wherein, the vent diverter is connected to control circuit mould
On the input of block.
Main idea is that vent diverter is connected in series with the first capacitor tandem.Therefore, vent diverter also with
Semiconductor switch is connected in series., can be by controlling circuit because vent diverter is connected on the input of control circuit module
Module detects or estimates several parameters respectively.
Specifically, the sensing heater is a kind of semibridge system sensing heater.
Preferably, at least two diodes are each connected in parallel on one of these semiconductor switch.
In addition, control circuit module can include detection circuit, the voltage drop for detecting vent diverter.
In addition, control circuit module can include microcontroller and analog-digital converter.
Preferably, these parts of sensing heater are all arranged on a single printed circuit board.It is described single
Printed circuit board (PCB) helps to sense the compact arrangement of heater.
Specifically, these parts of sensing heater are surface mount device (SMD).
According to a preferred embodiment of the invention, vent diverter has the resistance between 0.01 Ω and 0.1 Ω, specifically 0.05
Ω.Operation of this low resistance without interference with sensing heater.
Preferably, the control circuit module is provided for estimation in one semiconductor switch of switching and induction coil electric current
Follow-up zero crossing between phase angle delay.
For example, the control circuit module is provided for based on the pot of the phase angle delay estimation above the induction coil
Presence.
In addition, the control circuit module can be provided for based on the phase angle delay estimation above the induction coil
This pot in dissipated power.
Specifically, phase angle delay is estimated based on the induction coil electric current and the intersecting lens of null value.
For example, the intersecting lens is at least two sampled points based on the induction coil electric current to estimate.
Preferably, these semiconductor switch are transistors, specifically insulated gate bipolar transistor.
Finally, the present invention relates to a kind of induction type cooking hob, the induction type cooking hob includes at least more than one institute
The sensing heater referred to.
The novel and inventive features of the invention are listed in the dependent claims.
The present invention is described into refer to the attached drawing in further detail, in the accompanying drawings
Fig. 1 illustrates a kind of semibridge system induction heat hair with control circuit module according to a preferred embodiment of the invention
The circuit diagram of raw device,
Induction coil electric current, the inverter that Fig. 2 illustrates sensing heater according to a preferred embodiment of the invention are defeated
Go out the figure of voltage, grid voltage and shunt current,
Fig. 3 illustrates the figure of the shunt current of sensing heater according to a preferred embodiment of the invention,
Fig. 4 illustrates the detailed electricity of the detection circuit of semibridge system sensing heater according to a preferred embodiment of the invention
Lu Tu,
Fig. 5 illustrates the induction coil electric current and Shunt Voltage of sensing heater according to a preferred embodiment of the invention
Figure,
Fig. 6 illustrates the induction coil electric current and Shunt Voltage of sensing heater according to a preferred embodiment of the invention
Figure,
Fig. 7 illustrates the induction coil electric current and Shunt Voltage of sensing heater according to a preferred embodiment of the invention
Figure,
Fig. 8 illustrates the induction coil electric current and Shunt Voltage of sensing heater according to a preferred embodiment of the invention
Figure,
Fig. 9 illustrates the induction coil electric current and Shunt Voltage of sensing heater according to a preferred embodiment of the invention
Figure,
Figure 10 illustrates the circuit diagram that heater is sensed according to the semibridge system of prior art, and
Figure 11 illustrate according to the sensing induction coil electric current of heater of prior art, inverter output voltage and
The figure of grid voltage.
Fig. 1 illustrates a kind of semibridge system induction heat hair with control circuit module according to a preferred embodiment of the invention
The circuit diagram of raw device.
This semibridge system sensing heater includes rectification circuit 10.Rectification circuit 10 is connected to ac power supply terminal 12.
Appropriate semibridge system sensing heater includes the first transistor S1, second transistor S2, the first diode D1, the second diode
D2, four capacitor C1, C2, C3, C4, induction coil L and vent diverter SE.Control circuit module includes gate driving circuit
14th, microcontroller 16, power control circuit 18, zero-crossing detector 20 and detection circuit 22.Transistor S1 and S2 can be
MOSFET, IGBT, MCT or SIT.
The first transistor S1 is connected in series with second transistor S2.First diode D1 is connected in parallel to the first transistor S1
On.In the same way, the second diode D2 is connected in parallel on second transistor S2.In addition, the first capacitor C1 parallel connections are even
It is connected on the first transistor S1.Correspondingly, the second capacitor C2 is connected in parallel on second transistor S2.In other words, first is brilliant
Body pipe S1, the first diode D1 and the first capacitor C1 constitute first group of parallel element.In a similar way, second transistor
S2, the second diode D2 and the second capacitor C2 constitute second group of parallel element.First group, second group and vent diverter SE string
Connection connection.
In addition, first group, second group and vent diverter SE of tandem is connected in parallel to the 3rd capacitor C3 and the 4th electric capacity
In device C4 tandem.This arranged in parallel is connected in the output end of rectification circuit 10.
In addition, the tie point between the first transistor S1 and second transistor S2 is connected to the electricity of the 3rd capacitor C3 and the 4th
On tie point between container C4.An induction coil L terminal is connected between the first transistor S1 and second transistor S2
Tie point on.Induction coil L another terminal is connected to the tie point between the 3rd capacitor C3 and the 4th capacitor C4
On.
The input of detection circuit 22 is connected on second transistor S2 and vent diverter SE tie point.Detect circuit 22
Output end be connected on power control circuit 18.The output end of zero-crossing detector 20 is also connected to power control circuit 18
On.The output end of power control circuit 18 is connected on the input of microcontroller 16.The output end of microcontroller 16 is connected to
On the input of gate driving circuit 14.Two output ends of gate driving circuit 14 are respectively connecting to the first transistor S1 and
In two-transistor S2 coordination electrode.
Vent diverter SE has low-down resistance, such as about 0.05 ohm.Therefore, to semibridge system induction heat generator
The influence of characteristic be relatively small.Vent diverter SE senses the operation of heater without interference with semibridge system.Specifically, join
The delay of number phase angle, turn-off current and peak point current can be detected by detection circuit 22 on vent diverter SE.These inspections
Measured value is that microcontroller 16 is changed by detection circuit 22 and/or power control circuit 18.
Fig. 2 illustrates induction coil electric current IL, the inverter of sensing heater according to a preferred embodiment of the invention
Output voltage VS, primary grid voltage VG1, second grid voltage VG2 and shunt current IS figure.
Induction coil electric current IL, inverter output voltage VS, primary grid voltage VG1, second grid voltage VG2 and point
Stream electric current IS is synchronously shown as time t function.
Fig. 3 illustrates the shunt current IS of sensing heater according to a preferred embodiment of the invention figure.
First width figure shows the appropriate shunt current IS on the input of detection circuit 22.Second width figure shows tool
Offset shunt current IS during voltage 34.3rd width figure shows shunt current IS during with phase angle delay 28.
Fig. 4 illustrates the detailed of the detection circuit 22 of semibridge system sensing heater according to a preferred embodiment of the invention
Circuit diagram.Detect that circuit 22 includes operational amplifier 30, diode 32, eight resistor element R1 to R8 and two capacitors
C。
It is applied on resistor element R1 and is offset by resistor element R2 and R3 across vent diverter SE voltage, from
And cause operational amplifier 30 input receive on the occasion of.With reference to ground 34, sensing is reflected across the voltage of vent diverter 22
A coil current IL part.Allow only to put on the occasion of by operational amplifier 30 by resistor element R2 and the R3 skew carried out
Read greatly and by the AD converter input of microcontroller 16.
The output signal I1 and I2 of detection circuit 22 are filtered and the AD conversion of microcontroller 16 is transmitted it to
On device input.For example, output signal I1 and I2 are used as the parameter that pot detection and power are estimated.These parameters can pass through sense
The value that the phase angle between the output of heater and induction coil electric current IL zero crossing postpones is answered to obtain.Phase angle postpones
It can be exported by the combination of the feature and software algorithm of the AD converter in microcontroller 16.AD conversion can be in the cycle
Relative time be triggered beginning.If the relative time is provided with angle, then the complete cycle includes 360 degree.
For example, the sampling of AD converter is triggered on 45 °, 70 °, 90 °, 135 ° and 180 °.These estimated parameters
Can be turn-off current, peak point current and phase angle delay.Turn-off current is the electric current on 180 ° of cycle times.These samplings
Maximum in value can be taken as peak point current.
Phase angle delay is to disconnect a transistor S1 or S2 until the electric current in induction coil L is to prolong time between zero
Late.Phase angle delay can also be converted into the relative value relative to cycle time.In half period, relative time by 0 ° with
Value between 180 ° is provided.Assuming that each half period is symmetrical so that phase angle delay will all the time 90 ° with
Under interval in it is mobile.In actual applications, the scope of phase angle delay is between 20 ° to 90 °.If consumed without power
It is dispersed in load, then phase angle delay will be close to 90 °.Therefore, the appearance of pot 24 or 26 can be by using phase angle
Postpone to detect.In addition, phase angle delay can be used to estimate the power dissipation in pot 24 or 26.
Phase angle delay is to be determined by calculating induction coil electric current IL in intersection above freezing.Use these sample values.
When the condition of known half-bridge, then correct sampled value can be selected to carry out this calculating.The calculating is by assuming that two are adopted
Straight line between sampling point carrys out rough estimate intersection point.Intersection point at zero can be calculated by simple formula.The half-bridge
State changed according to the load above induction coil L and/or pot 24 or 26.Only on the one hand without pot 24 or 26
And in the case of state of the another aspect state close to resonance and between them, the state of the half-bridge just can be in circulation electricity
Change between stream.Correct sampled point need to rely on the state of sensing heater to be selected.This part of figure should
This is used in the case that current slope (dI/dt) is assumed or is assumed close to straight line.In this case, by mistake
Difference is relatively small.
Fig. 5 shows the example of generator state into Fig. 9.
Fig. 5 illustrates the induction coil electric current IL and inverter of sensing heater according to a preferred embodiment of the invention
Output voltage VS figure.The power is very high, and the state is close to resonance.Show intersecting lens 36.Intersecting lens 36
Sampled point on 0 ° and 45 °.Zero cross point is represented by reference number 38.
Fig. 6 illustrates the induction coil electric current IL and inverter of sensing heater according to a preferred embodiment of the invention
Output voltage VS figure.In this state, without pot above induction coil L.Zero cross point is represented by reference number 38.
Fig. 7 illustrates the induction coil electric current IL and inverter of sensing heater according to a preferred embodiment of the invention
Output voltage VS figure.In this state, power is relatively low.
Fig. 8 illustrates the induction coil electric current IL and inverter of sensing heater according to a preferred embodiment of the invention
Output voltage VS figure.In this state, power low in appearance.
Fig. 9 illustrates the induction coil electric current IL and inverter of sensing heater according to a preferred embodiment of the invention
Output voltage VS figure.Power in this state is middle high.
Figure 10 illustrates a kind of zero voltage switching semibridge system induction heat with control circuit module according to prior art
Generator.The semibridge system sensing heater includes transistor S1 and S2, diode D1 and D2, induction coil L and four
Capacitor C1, C2, C3 and C4.Rectification circuit 10 also includes four diodes and another capacitor.Rectification circuit 10 is provided
For being connected to ac power supply terminal 12.In addition, the sensing heater include gate driving circuit 14, microcontroller 16,
Power control circuit 18, zero-crossing detector 20 and HF current transformer 40.
Figure 11 illustrates induction coil electric current IL, the inverter output voltage VS of the sensing heater according to prior art
And grid voltage VG1 and VG2 figure.
Although there have been described herein the present invention illustrative embodiment, it should be understood that, the present invention not by
It is limited to this specific embodiment, and without departing from the scope or spirit of the invention, those skilled in the art can be with
Carry out various other changes and modification.All such changes and modifications, which are intended to, to be comprised in defined by the appended claims originally
Within the scope of invention.
List of reference characters
10 rectification circuits
12 ac power supply terminals
14 gate driving circuits
16 microcontrollers
18 power control circuits
20 zero-crossing detectors
22 detection circuits
24 small loads
26 heavy loads
28 phase angles postpone
30 operational amplifiers
32 diodes
34 ground
36 intersecting lenses
38 zero crossings
40 HF current transformers
42 offset voltages
S1 the first transistors
S2 second transistors
The diodes of D1 first
The diodes of D2 second
The capacitors of C1 first
The capacitors of C2 second
The capacitors of C3 the 3rd
The capacitors of C4 the 4th
L induction coils
SE vent diverters
C capacitors
R1 resistor elements
R2 resistor elements
R3 resistor elements
R4 resistor elements
R5 resistor elements
R6 resistor elements
R7 resistor elements
R8 resistor elements
IL induction coil electric currents
VS inverter output voltages
VG1 primary grid voltages
VG2 second grid voltages
IS shunt currents
The output signals of I1 first
The output signals of I2 second
Claims (13)
1. one kind sensing heater, wherein：
- sensing the heater includes a rectification circuit (10),
The one input of-rectification circuit (10) is connected on an ac power supply terminal (12),
- four capacitors (C1, C2, C3, C4) form a bridge-type electricity between two lead-out terminals of the rectification circuit (10)
Road,
- the bridge circuit includes a first capacitor tandem (C1, C2) and a second capacitor tandem (C3, C4),
- one induction coil (L) is interconnected in the center of the bridge circuit,
- at least two semiconductor switch (S1, S2) are each parallel-connected to the electric capacity of at least the first capacitor tandem (C1, C2)
On one of device (C1, C2), and
- sensing the heater includes a control circuit module (14,16,18,20,22), for controlling the semiconductor to open
The coordination electrode of (S1, S2) is closed,
It is characterized in that
One vent diverter (SE) is connected in series with the first capacitor tandem (C1, C2), wherein, the vent diverter (SE) with
The first capacitor tandem (C1, C2) is interconnected between the lead-out terminal of the rectification circuit (10), and wherein, the vent diverter
(SE) it is connected on an input of the control circuit module (14,16,18,20,22),
The control circuit module (14,16,18,20,22) includes a detection circuit (22), for detecting the vent diverter (SE)
Voltage drop (VS), and
The control circuit module (14,16,18,20,22) be provided for estimation one semiconductor switch (S1, S2) of switching with
Phase angle delay (28) between the follow-up zero crossing of one induction coil electric current (IL), phase angle delay (28) is base
In the induction coil electric current (IL) and null value an intersecting lens (36) come what is estimated, and the intersecting lens (36) is to be based on
At least two sampled points of the induction coil electric current (IL) are estimated.
2. sensing heater according to claim 1,
It is characterized in that
The sensing heater is a semibridge system sensing heater.
3. sensing heater according to claim 1 or 2,
It is characterized in that
At least two diodes (D1, D2) are each connected in parallel on one of described semiconductor switch (S1, S2).
4. sensing heater according to claim 1 or 2,
It is characterized in that
The control circuit module (14,16,18,20,22) includes a microcontroller (16) and an analog-digital converter.
5. sensing heater according to claim 1 or 2,
It is characterized in that
All parts of the sensing heater are arranged on a printed circuit board (PCB).
6. sensing heater according to claim 1 or 2,
It is characterized in that
The part of the sensing heater is surface mount device (SMD).
7. sensing heater according to claim 1 or 2,
It is characterized in that
The vent diverter (SE) has the resistance between 0.01 Ω and 0.1 Ω.
8. sensing heater according to claim 1,
It is characterized in that
The control circuit module (14,16,18,20,22) is provided for based on phase angle delay (28) estimation in the sensing
The presence of a pot (24,26) above coil (L).
9. sensing heater according to claim 8,
It is characterized in that
The control circuit module (14,16,18,20,22) is provided for based on phase angle delay (28) estimation in the sensing
The dissipated power in the pot (24,26) above coil (L).
10. the sensing heater according to claim 1,2,8 or 9,
It is characterized in that
The semiconductor switch (S1, S2) is transistor.
11. sensing heater according to claim 7,
It is characterized in that
The vent diverter (SE) has 0.05 Ω resistance.
12. sensing heater according to claim 10,
It is characterized in that
The semiconductor switch (S1, S2) is insulated gate bipolar transistor.
13. a kind of induction type cooking hob,
It is characterized in that
The induction type cooking hob includes the sensing heater ated least one according to any one of claim 1 to 12.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP12181929.6 | 2012-08-28 | ||
| EP12181929.6A EP2704520B1 (en) | 2012-08-28 | 2012-08-28 | An induction heating generator and an induction cooking hob |
| PCT/EP2013/065902 WO2014032881A1 (en) | 2012-08-28 | 2013-07-29 | An induction heating generator and an induction cooking hob |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104541573A CN104541573A (en) | 2015-04-22 |
| CN104541573B true CN104541573B (en) | 2017-09-22 |
Family
ID=46969995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380042725.0A Active CN104541573B (en) | 2012-08-28 | 2013-07-29 | Sense heater and induction type cooking hob |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9788368B2 (en) |
| EP (1) | EP2704520B1 (en) |
| CN (1) | CN104541573B (en) |
| AU (1) | AU2013307638B2 (en) |
| WO (1) | WO2014032881A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3002991B1 (en) * | 2014-10-02 | 2022-07-13 | LG Electronics Inc. | Induction heat cooking apparatus |
| EP3445135B1 (en) * | 2017-08-14 | 2020-05-27 | Electrolux Appliances Aktiebolag | Power module and cooking appliance |
| US11678410B2 (en) * | 2019-07-24 | 2023-06-13 | Haier Us Appliance Solutions, Inc. | Determining presence of compatible cookware in induction heating systems |
| US20230371136A1 (en) * | 2022-05-16 | 2023-11-16 | Whirlpool Corporation | Control system and method for active heating control |
| EP4383942A1 (en) * | 2022-12-07 | 2024-06-12 | Electrolux Appliances Aktiebolag | Induction hob and method for determining electrical current of an induction hob |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6064584A (en) * | 1998-09-11 | 2000-05-16 | Brandt Cooking | Inverter power supply device with controlled output power |
| CN101946559A (en) * | 2008-02-19 | 2011-01-12 | 松下电器产业株式会社 | Induction heat cooking device |
| EP2360989A1 (en) * | 2010-02-12 | 2011-08-24 | Delta Electronics, Inc. | Heating device having function of detecting location of foodstuff container |
| CN102186271A (en) * | 2009-11-26 | 2011-09-14 | E.G.O.电气设备制造股份有限公司 | Method and induction heating device for determining a temperature of the base of a cooking vessel |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8701314A (en) * | 1987-06-05 | 1989-01-02 | Philips Nv | DC AC CONVERTER FOR LIGHTING AND POWERING A GAS DISCHARGE LAMP. |
| DE10205896A1 (en) | 2002-02-13 | 2003-09-04 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Operating circuit for discharge lamp with variable-frequency ignition |
| JP2004048945A (en) | 2002-07-15 | 2004-02-12 | Hitachi Ltd | Resonant circuit and power conversion system using the same |
| JP4922136B2 (en) * | 2007-11-14 | 2012-04-25 | 株式会社東芝 | Induction heating cooker |
| US7605499B2 (en) * | 2008-02-25 | 2009-10-20 | General Electric Company | Systems and methods of dynamic reactive support for a power transmission system |
| US9006624B2 (en) * | 2010-07-22 | 2015-04-14 | General Electric Company | Resonant frequency detection for induction resonant inverter |
-
2012
- 2012-08-28 EP EP12181929.6A patent/EP2704520B1/en active Active
-
2013
- 2013-07-29 US US14/417,420 patent/US9788368B2/en active Active
- 2013-07-29 AU AU2013307638A patent/AU2013307638B2/en active Active
- 2013-07-29 WO PCT/EP2013/065902 patent/WO2014032881A1/en active Application Filing
- 2013-07-29 CN CN201380042725.0A patent/CN104541573B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6064584A (en) * | 1998-09-11 | 2000-05-16 | Brandt Cooking | Inverter power supply device with controlled output power |
| CN101946559A (en) * | 2008-02-19 | 2011-01-12 | 松下电器产业株式会社 | Induction heat cooking device |
| CN102186271A (en) * | 2009-11-26 | 2011-09-14 | E.G.O.电气设备制造股份有限公司 | Method and induction heating device for determining a temperature of the base of a cooking vessel |
| EP2360989A1 (en) * | 2010-02-12 | 2011-08-24 | Delta Electronics, Inc. | Heating device having function of detecting location of foodstuff container |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2704520B1 (en) | 2016-11-16 |
| AU2013307638B2 (en) | 2016-12-08 |
| AU2013307638A1 (en) | 2015-02-05 |
| US9788368B2 (en) | 2017-10-10 |
| EP2704520A1 (en) | 2014-03-05 |
| CN104541573A (en) | 2015-04-22 |
| US20150208467A1 (en) | 2015-07-23 |
| WO2014032881A1 (en) | 2014-03-06 |
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